<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>input基本使用</title>
</head>
<body>
  文本框<input type="text">
  <br>
  密码框<input type="password">
  <br>
  单选框<input type="radio">
  <br>
  复选框<input type="checkbox">
  <br>
  上传文件<input type="file">
</body>
</html>